[Effect of experimental hyper- and hypothyrosis on the level of various forms of vitamin A in various tissues of albino rats].
A method allowing simultaneous assay of the tissue content of three forms of vitamin A (alcohol, ester, aldehyde) was applied for investigation of these forms in liver, kidneys, adrenals and blood plasma in rats with experimental hyper- and hypothyreosis. It is established that compared to control rats, hyperthyroid animals show increased content of vitamin A-alcohol in adrenals with simultaneous decrease in liver of vitamin A-alcohol and especially of its ester. It is supposed that these changes are directly induced by the action of thyroxine on vitamin A metabolism in tissues. During hyperthyreosis, content of vitamin A (alcohol and ester) in liver sharply falls and there is a tendency towards its decrease on blood plasma and adrenals. Approximately the same ratio of alcohol and ester of vitamin A in kidneys indicated its intensive metabolism in this organ. As judged from the absence of changes in content of vitamin A-aldehyde in organs, activation as well as suppression of the function of thyroid gland apparently is not followed by an increase in oxidative transformation of vitamin A in tissues.
D000311:Adrenal Glands / Q000378:metabolism*; D000818:Animals; D006980:Hyperthyroidism / Q000139:chemically induced / Q000378:metabolism*; D007037:Hypothyroidism / Q000139:chemically induced / Q000378:metabolism*; D007668:Kidney / Q000378:metabolism*; D008099:Liver / Q000378:metabolism*; D008297:Male; D051381:Rats; D014801:Vitamin A / Q000097:blood / Q000378:metabolism*
D014801:Vitamin A
Vliianie éksperimental'nogo giper- i gipotireoza na soderzhanie razlichnykh form vitamina A v nekotorykh tkaniakh belykh krys.